Method of regulating blowing-engines



0., H. SMOOT] METHOD OF REGULATING BLOWING ENGINES.

APPLICATION FILED OCT. 25, 1920.

1,390,829. PatentedSept. 13, 1921.

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IN V EN TOR.

fort of diaphragm through sage of steam to turbine D through UNITED ,STATES PATENT OFFICE.

CHARLES H. SHOOT, SOUTH. ORANGE, NEW JERSEY, ASSIGNOR-TO RA'I'EAU' BAT'IU smoor ENGINEERING DELAWARE.

Specification of Letters Patent.

CORPORATION, or NEW YORK, N. Y., A CORPORATION or METHOD or REGULAIING BLowiNs-ENeiN s.

Patented Sept. ra ser;

Application filed October 25, 1920. Serial No. 419,268.

To all whom it may concern.-

Be it known that I, CHARLES H. SMooT, a citizen of the United States, and resident of South Orange, State of New Jersey, have invented. certain new and useful improvements in Methods of Regulating Blowing Engines, of which the following is a speci,

fication.

I invention relates in general to improved meansadapted to regulate blowers operating in series.

Une object ofmy invention is to provide a method of regulation for a blast of air varying in volume'and pressure, such, for instance, as supplies the air necessary for the proper operation of a blast furnace.

The figure is a diagrammatic vertical view oi? one embodiment of my invention. A. is a blower, driven by steam turbine H. is a second blower, acting as a booster for blower A. C is driven by steam turbine D. Air enters conduit 1', passes through Venturi element 2, is compressed in blower A and discharged through conduit 3. From conduit 3 the air flows throughbvpass l, checlr valve 5 and dischargeconduit 6 to the point of use. 7 is a conduit leading from conduit 3 to inlet of blower C. 8 is the discharge conduit of blower C to discharge conduit 6. The steam operating turbine E is admitted through inlet 9, valve 10 and pipe 11. The exhaust of the steam operating turbine B is shown at 12. 13 is the inlet of steam operating turbine D. Valve 14 controls the paspipe 15. 16 is the enhaust of turbine D. 17 is a pipe allowing the passage of the air flowing through Venturi element 2 to act upon dia phragm 18. 19 is a pipe allowing pressure of air inlet in conduit 1 to operate on dia phragm 18. 20 are weights opposing the al 18 through lever 21.

To those skilled in the art, the regulator operating valve 10 is well known and known as a constant volume regulator, the differential pressure applied. to diaphragm 18 pipes l'Z and 19 being in direct ratio tb the square of the volume entering blower A. No effort has been made to show this regulator other than diagrammatically, as it is a well known standard apparatus.

;- Pipe 22 allows thepressure of blower dis-- charge in conduit 3 to bear on diaphragm 23,

it is well lrnown in the pressureregulator of tubine ll standard piece of apparatus, lrnown as"a pressure regulator, and hasonly been illustrated and described diagrammatically, the art.

Q5 and 5% are the couplings connecting turbine B and blower A, and turbine U and blower U, respectively.

it is well known that the volumes and pressures necessary for the properoperation of blast furnaces, for instance, vary greatly.

- it will be seen that to generate a how oil air with the average requirements of meetingpressure thepower generated by turbine B may be so selected that turbo blower All will operate very frequently at full load. In order to obtain the greater pressure necessary for the proper operation oi the blast furnace from time to time the volume of air discharged by blower'A must be compressed further, and for this purpose it is brought into blower C and its pressure increased be fore the blast is discharged through conduit 6 to the point of use.

it will be seen that I have provided means to operate a blower in such a manner that the blower will handle a predetermined vol ume of air until a certain pressure is reached This air is delivered to the point of use and when the pressure oi the air delivered by the blower ll is not sullicient to overcome the resistance at the point of use for the passage of said air, then a rise in pressure will talre place at the discharge of will allow steam. to flow and operate the turbine, which in turn drives blower J, check valve 5 will close and the pressure delivered at the point of use will be increased bythe action of said blower U.

lt will be seen that l have provided means to have a predetermined volume oil air compressed to thepressure required at the point of use. The speed of turbo blower All is con-- trolled by a constant volume "regulator and the speed of turbo blower acting as booster blower ll,

lllil CD is controlled in such a way that it will increase when increased pressures are rewell adapted to the operation of blast furnaces.

v It has also a large number of applications in chemical works, for instance, where a certain gas in known quantities has to be introduced at varying pressures in a given apparatus.

Referring once more to blast furnace work, if turbo blower AB can deliver at full load 50,000 cubic feet of free air per minute at pounds gage pressure at times when the furnace required this amount of air at pressures ranging from 20 to 30 pounds, turbo blower booster CD will make up the pressure from 20 to 30 pounds, the increase oi" power required being obtained independently of turbo blower AB.

1 claim I 1. The method of regulating turbo blowers operating in series which consists in regulating the first turbo blower for constant pre determined volume and regulatingthe second turbo blower for constant predetermined inlet pressure.

2. The method of regulating turbo-blowers operating in series which consists in regulating the first turbo-blower for constant pre determined volume and regulating the second turbo-blower in such a manner as to increase its speed for increasing pressures at its inlet.

CHARLES .H. SMOGT. 

